Persistent photo-excited conducting states in functionalized pentacene

T. Tokumoto; J. S. Brooks; D. Graf; E. S. Choi; N. Biskup; D. L. Eaton; J. E. Anthony; S. A. Odom

doi:10.1016/j.synthmet.2005.07.179

Persistent photo-excited conducting states in functionalized pentacene

T. Tokumoto, J. S. Brooks, D. Graf, E. S. Choi, N. Biskup, D. L. Eaton, J. E. Anthony, S. A. Odom

Producción científica: Article › revisión exhaustiva

5 Citas (Scopus)

Resumen

We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

Idioma original	English
Páginas (desde-hasta)	449-452
Número de páginas	4
Publicación	Synthetic Metals
Volumen	152
N.º	1-3
DOI	https://doi.org/10.1016/j.synthmet.2005.07.179
Estado	Published - sept 20 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.synthmet.2005.07.179

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title = "Persistent photo-excited conducting states in functionalized pentacene",

abstract = "We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.",

keywords = "Organic semiconductors based on conjugated molecules, Photoconductivity",

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AU - Tokumoto, T.

AU - Brooks, J. S.

AU - Graf, D.

AU - Choi, E. S.

AU - Biskup, N.

AU - Eaton, D. L.

AU - Anthony, J. E.

AU - Odom, S. A.

PY - 2005/9/20

Y1 - 2005/9/20

N2 - We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

AB - We report a study of long-lived photo-excited states in single crystals of functionalized forms of pentacene: 6,13-bis (triisopropylsilylethynyl) pentacene, 6,13-bis (triethylsilylethynyl) pentacene, and 6,13-bis (triethylgermylethynyl) pentacene, organic semiconductors with band gaps ≈1 eV. The relaxation rates are thermally activated, as determined from time and temperature-dependent measurements of the photo-conductivity after illumination. These states can be produced in a stable population at temperatures below 150 K. Hence, after low temperature illumination, thermally stimulated current (TSC) is observed as temperature increases. Trap energies associated with these states can be estimated by analysis of the TSC signal.

KW - Organic semiconductors based on conjugated molecules

KW - Photoconductivity

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Persistent photo-excited conducting states in functionalized pentacene

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